The Posiflex Armrest (single) is a dynamic armrest that allows the user unlimited motion.  In and out, left to right, circular, and much more, the Posiflex Armrest literally follows the user wherever their arms go.  With tension motion adjustments, height markers to mark the height of the arms, and a gel soft arm pad that can be used for an elbow or forearm rest, the Posiflex Armrest (single) is a great option for people who want a single arm support for either arm.  Sleek design keeps overall  chair dimension at a minimum as well. Armrest can be added to any chair. RGP chairs as well as other brands.